Opening and closing device and electric appliance

Abstract

The utility model discloses a kind of opening and closing device and electrical equipment, it is related to household appliance technical field.Opening and closing device includes box, door body and hinge assembly, box is equipped with opening, the side wall of box side is equipped with reference plane;Door body is installed in box by hinge assembly at one end close to reference plane, door body is equipped with the first accommodating slot for accommodating at least part of hinge assembly, the rotation axis of hinge assembly is located in door body.The utility model can reduce even eliminate the size of hinge assembly protruding from the surface of door body, to reduce the possibility of scratch of hinge assembly with wall body in the process of door body rotation, further, it can also make rotation axis more close to the first edge of door body, can reduce the size of door body exceeding reference plane in the process of door body rotation, to reduce the possibility of scratch of door body with wall body, can reduce the distance between box and wall body, to reduce the space occupation of opening and closing device.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to an opening and closing device and electrical equipment. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] Household appliances such as refrigerators, freezers, dishwashers, and sterilizers typically consist of a cabinet and a door hinged to the opening of the cabinet. To save indoor space, users usually place these appliances against a wall. However, the door of the appliance can easily rub against the wall during the opening and closing process. Increasing the distance between the appliance and the wall increases the space occupied by the appliance, both of which negatively impact the user experience. Utility Model Content

[0004] The purpose of this invention is to at least solve the problems of existing electrical appliances easily scratching walls or occupying a large amount of indoor space. This purpose is achieved through the following technical solution:

[0005] In a first aspect, this utility model proposes an opening and closing device, including a housing, a door, and a hinge assembly. The housing has an opening, and a reference surface is provided on one side wall of the housing. The door is closable over the opening, and one end of the door near the reference surface is mounted to the housing via the hinge assembly. The door includes an intersecting first surface and a second surface. The first surface is disposed away from the opening, and the second surface is adjacent to the hinge assembly and parallel to the rotation axis of the hinge assembly. The second surface is on the same side as the reference surface and is flush with it. The second surface has a first receiving groove, and the housing has a second receiving groove. A portion of the hinge assembly is located in the first receiving groove, and another portion is located in the second receiving groove. The rotation axis of the hinge assembly is located inside the door.

[0006] According to the opening and closing device provided by this utility model, a first receiving groove for accommodating part of the hinge assembly is provided at the connection position between the door body and the hinge assembly, and a second receiving groove for accommodating another part of the hinge assembly is provided on the housing. The rotation axis of the hinge assembly is located inside the door body. Compared with the method where the hinge assembly is located outside the door body, the first receiving groove and the second receiving groove can reduce or even eliminate the size of the hinge assembly protruding from the door body and the housing, thereby reducing the possibility of the hinge assembly rubbing against the wall during the rotation of the door body. Furthermore, the rotation axis can be made closer to the first edge of the door body on the same side as the reference surface and away from the housing, so as to reduce the size of the door body exceeding the reference surface during the rotation of the door body, thereby reducing the possibility of the door body rubbing against the wall. Correspondingly, the distance between the housing and the wall can also be reduced, thereby reducing the space occupied by the opening and closing device.

[0007] In addition, the opening and closing device provided by this utility model may also have the following additional technical features:

[0008] In some embodiments of this utility model, the first receiving groove has a first opening on the side wall facing the box body, and the second receiving groove has a second opening on the side wall facing the door body that communicates with the first opening. The first receiving groove and the second receiving groove are connected through the first opening and the second opening.

[0009] In some embodiments of this utility model, the hinge assembly protrudes from the second surface in a direction perpendicular to the second surface. The maximum dimension of the portion of the hinge assembly protruding from the second surface is less than the oversize S of the door body, where S = L1 - L2. The first surface and the second surface intersect to form a first edge. L1 is the maximum perpendicular distance between the rotation axis and the first edge, and L2 is the minimum distance between the rotation axis and the second surface.

[0010] In some embodiments of this utility model, the hinge assembly includes a first hinge member, a second hinge member, and a pivot. The first hinge member and the second hinge are arranged along the axial direction of the pivot and are pivotally connected by the pivot. The length direction of the first receiving groove is arranged along the axial direction of the pivot. The first hinge member and the pivot are both located in the first receiving groove. The first hinge member is connected to the first receiving groove. A portion of the second hinge member is located in the first receiving groove, and another portion is connected to the second receiving groove.

[0011] In some embodiments of this utility model, the hinge assembly further includes a swing shaft arranged parallel to the rotating shaft. The rotating shaft is located between the bottom wall of the first receiving groove and the swing shaft. The portion of the second hinge member located in the first receiving groove is provided with a limiting part. The swing shaft is installed on the first hinge member and slidably connected to the limiting part. The limiting part has a first end away from the box body and a second end away from the door body. When the door body is closed, the swing shaft is located at the first end. When the door body rotates relative to the box body to the maximum angle, the swing shaft is located at the second end.

[0012] In some embodiments of this utility model, the length direction of the second receiving groove is arranged along the arrangement direction from the door body to the box body. The hinge assembly further includes a transmission member and an elastic member located in the second receiving groove. The bottom wall is provided with a mounting seat. One end of the transmission member extends out of the second receiving groove and is fixedly connected to the swing shaft. The other end of the transmission member is slidably connected to the mounting seat. The elastic member is sleeved on the transmission member. One end of the elastic member is connected to the transmission member. The other end of the elastic member is connected to the mounting seat. The elastic member is configured to be stretched when the swing shaft is located at the first end.

[0013] In some embodiments of this utility model, along the arrangement direction from the rotating shaft to the swing shaft, the minimum distance between the rotating shaft and the swing shaft is 1mm-5mm.

[0014] In some embodiments of this utility model, the first receiving groove includes a bottom wall parallel to the second surface, and the second hinge seat has a predetermined interval with the bottom wall.

[0015] In some embodiments of this utility model, a sealing element is provided between the door body and the box body, and part of the sealing element is located between the first receiving groove and the second receiving groove. The second hinge member has an avoidance notch on the side facing the sealing element, and the avoidance notch is used to accommodate the portion of the sealing element located between the first receiving groove and the second receiving groove.

[0016] Secondly, this utility model provides an electrical device, including an electrical component and an opening / closing device as described in any of the above technical solutions, wherein the electrical component is installed on the opening / closing device. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 A schematic diagram of the opening and closing device according to an embodiment of the present invention is shown.

[0019] Figure 2 for Figure 1 Enlarged view of part A;

[0020] Figure 3 A schematic diagram illustrating the interaction between the opening / closing device and the wall according to an embodiment of the present invention is shown.

[0021] Figure 4 for Figure 3 Enlarged view of part b;

[0022] Figure 5 A schematic diagram of the hinge assembly from one perspective according to an embodiment of the present invention is shown.

[0023] Figure 6 A schematic diagram of the hinge assembly from another perspective according to an embodiment of the present invention is shown.

[0024] The attached figures are labeled as follows:

[0025] 100. Opening and closing device;

[0026] 10. Box body; 11. Reference plane; 111. Second receiving groove; 1111. Second opening;

[0027] 20. Door body; 21. First surface; 22. Second surface; 221. First receiving groove; 2211. First opening; 23. Third surface; 24. Fourth surface;

[0028] 30. Hinge assembly; 31. First hinge component; 32. Second hinge component; 321. Limiting part; 322. First bottom wall; 323. First side wall; 324. Clearance notch; 33. Rotating shaft; 34. Swing shaft; 35. Transmission component; 351. Bushing part; 352. Connecting part; 353. Rod part; 36. Elastic element; 37. Mounting base; 371. Connecting through hole;

[0029] 40. Sealing components;

[0030] 200. Walls. Detailed Implementation

[0031] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0032] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0033] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0034] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0035] Taking a freezer with its door hinged at the top opening of the cabinet as an example, as the door opens upwards, the distance between the door edge and the back of the cabinet gradually increases. The door edge is very likely to rub against the wall. Increasing the distance between the back of the cabinet and the wall will cause the appliance to occupy too much indoor space. Both of these situations will reduce the user experience.

[0036] The reason for the above problem is that the door body has a large over-cabinet amount during the rotation process. The over-cabinet amount is the maximum size of the door body that exceeds the back of the box during the rotation process. Therefore, how to reduce the over-cabinet amount of the door body is an urgent technical problem to be solved.

[0037] In view of this, the present invention provides an opening and closing device and an electrical device having the opening and closing device to solve the above-mentioned technical problems.

[0038] The following is in conjunction with the appendix Figure 1-6 The structure of the opening and closing device 100 provided in the embodiments of this application will be described.

[0039] Combined with appendix Figure 1 and attached Figure 2 As shown, this application embodiment provides an opening and closing device 100, which can serve as the main structure of an electrical device. The opening and closing device includes a housing 10, a door 20, and a hinge assembly 30.

[0040] The box 10 has a receiving cavity (not shown in the figure) for storing items. The box 10 is provided with an opening (not shown in the figure) communicating with the receiving cavity. The opening can be located at the top of the box 10 or at the side of the box 10. In this embodiment, the opening is described as being located at the top of the box 10.

[0041] The side wall of the housing 10 has a reference surface 11 for facing the wall 200. The reference surface 11 can be the back or side of the housing 10. In some embodiments, the reference surface 11 can be a vertical surface. This embodiment takes the back of the housing 10 as the reference surface 11 as an example.

[0042] The door 20 is pivotally mounted to the opening of the box 10 via the hinge assembly 30, so that the door 20 can close the opening and open the opening after the door 20 is rotated, so that the box 10 can be used for storage and retrieval of items respectively.

[0043] The door body 20 includes an intersecting first surface 21 and a second surface 22. The first surface 21 is disposed away from the opening, and the second surface 22 is adjacent to the hinge assembly 30 and parallel to the rotation axis of the hinge assembly 30. The second surface 22 is on the same side as the reference plane 11 of the housing 10.

[0044] It should be noted that the second surface 22 is adjacent to the hinge assembly 30. It can be understood that the door body 20 has multiple sides between the first surface 21 and the lower surface of the door body 20. One of these sides is the second surface 22. Along the arrangement direction perpendicular to the door body 20 and the box body 10 (the vertical direction in the figure), the opposite side of the second surface 22 is the third surface 23. The distance between the second surface 22 and the hinge assembly 30 is closer than the distance between the third surface 23 and the hinge assembly 30. Therefore, it can be said that the second surface 22 is adjacent to the hinge assembly 30, or that the second surface 22 is set close to the hinge assembly 30, while the third surface 23 is set away from the hinge assembly 30.

[0045] In some embodiments, when the door 20 is installed at the top opening of the housing 10, the first surface 21 may be the upper surface of the door 20, the second surface 22 may be a rear side of the door 20, and the third surface 23 may be the front side of the door 20.

[0046] To reduce the possibility of the door 20 scraping against the wall 200 during opening and closing, and to reduce the space occupied by the opening and closing device 100 in the user's room, this embodiment provides a first receiving groove 221 on one surface of the door 20 near the reference surface 11. The first receiving groove 221 can accommodate... Figure 1 and 2 The accommodating hinge assembly 30 shown is illustrated.

[0047] Of course, the first receiving groove 221 can also accommodate all the hinge components 30. In this case, the first hinge may only include a pivot 33 installed in the first receiving groove 221, and the pivot 33 is pivotally connected to the housing 10 (this embodiment is not shown in the figure). Therefore, it can be concluded that whether the first receiving groove 221 accommodates part or all of the hinge components 30 needs to be determined according to the specific structural form of the hinge components 30.

[0048] Furthermore, when the door body 20 is provided with a first receiving groove 221, and the hinge assembly 30 is installed in the first receiving groove 221, the rotation axis of the hinge assembly 30 can be located inside the door body 20. When the hinge assembly 30 includes a pivot 33, the rotation axis of the hinge assembly 30 can be the axis of the pivot 33 or the axis center. Of course, the rotation axis of the hinge assembly 30 is also the rotation axis of the door body 20.

[0049] Compared to the hinge assembly 30 being located on the outside of the door body 20 (e.g., located on the second surface 22 and protruding from the second surface 22), the first receiving groove 221 of this embodiment can reduce or even eliminate the size of the hinge assembly 30 protruding from the surface of the door body 20 on the same side as the reference surface 11, thereby reducing the possibility of the hinge assembly 30 rubbing against the wall 200 during the rotation of the door body 20.

[0050] Furthermore, the rotation axis can be made closer to the first edge of the door 20 that is on the same side as the reference plane 11 and away from the box 10 (the edge formed by the intersection of the first surface 21 and the second surface 22 in the figure), combined with the attached... Figure 3 and attached Figure 4 As shown in the figure (the arc arrow in the figure indicates the rotation direction of the door 20, and the state of the door 20 after rotation is shown by the dashed line in the figure), the distance between the first edge formed by the intersection of the rotation axis and the first surface 21 and the second surface 22 is L1, the distance between the rotation axis and the second surface 22 is L2, and the maximum dimension (oversize S) of the door 20 exceeding the reference plane 11 during the rotation of the door 20 is L1-L2. Therefore, it can be concluded that the oversize of the door 20 is positively correlated with L1.

[0051] Therefore, when the first receiving groove 221 is used to reduce L1 in this embodiment, the size of the door body 20 exceeding the reference plane 11 during the rotation of the door body 20 can be significantly reduced (oversized amount), thereby reducing the possibility of the door body 20 scraping against the wall 200. Correspondingly, the distance between the box body 10 and the wall 200 can also be shortened, thereby reducing the space occupied by the opening and closing device 100.

[0052] Combined again with the appendix Figure 2 As shown, in some examples, optionally, the second surface 22 of this embodiment has a first receiving groove 221.

[0053] In this embodiment, the first receiving groove 221 can be located on the second surface 22 or on the fourth surface 24 of the door 20 facing the box 10 (this embodiment is not shown in the figure). Compared with opening the first receiving groove 221 on the fourth surface 24, opening the first receiving groove 221 on the second surface 22 is not only more convenient for the installation of the hinge assembly 30, but also makes it easier to process the first receiving groove 221 to a suitable depth to reduce the distance between the rotation axis of the hinge assembly 30 and the first edge, thereby further reducing the over-box amount.

[0054] Combined with appendix Figure 2 Appendix Figure 4-6 As shown, in addition to the above-mentioned improvements to the door body 20, this embodiment also improves the structure of the hinge assembly 30.

[0055] In some examples, the hinge assembly 30 of this embodiment may optionally include a first hinge member 31, a second hinge member 32, and a pivot 33. The first hinge member 31 and the second hinge member 32 are arranged along the axial direction of the pivot 33. The pivot 33 passes through the first hinge member 31 and the second hinge member 32 respectively. The first hinge member 31 and the second hinge member 32 can rotate relative to each other.

[0056] Furthermore, the first hinge 31 can be pivotally connected to the pivot 33, and the second hinge 32 can be fixedly connected to the pivot 33; or the second hinge 32 can be pivotally connected to the pivot 33, and the first hinge 31 can be fixedly connected to the pivot 33. Both of these methods can achieve relative rotation between the first hinge 31 and the second hinge 32.

[0057] The first hinge member 31 is connected to the side wall or bottom wall of the first receiving groove 221 by bolts, screws or other connecting parts. The upper end of the second hinge member 32 is at least partially accommodated in the first receiving groove 221 and may not be connected to the first receiving groove 221. The remaining part of the second hinge member 32 is used to connect to the box body 10 so that when the door body 20 rotates, the first hinge member 31 rotates relative to the second hinge member 32 and the second hinge member 32 is fixed to the box body 10.

[0058] In some embodiments, there may be a gap or interval between the first hinge member 31 and the second hinge member 32 to prevent friction between them during mutual rotation.

[0059] Combined with appendix Figure 4 As shown, in some examples, the hinge assembly 30 may optionally extend beyond the second surface 22. Specifically, the upper ends of the first hinge member 31 and / or the second hinge member 32 may extend beyond the second surface 22, meaning that the depth of the first receiving groove 221 may be less than the size of the first hinge member 31 and / or the size of the upper end of the second hinge member 32.

[0060] Furthermore, along the direction perpendicular to the second surface 22 (the horizontal direction in the figure), the maximum dimension of the hinge assembly 30 protruding from the second surface 22 is less than the oversize S of the door body, so that the door body 20 can reduce the opening depth of the first receiving groove 221 to facilitate processing without increasing the oversize S of the door body 20.

[0061] Combined again with the appendix Figure 4 As shown, in some examples, optionally, there is a preset interval c between the second hinge member 32 and the bottom wall of the first receiving groove 221. This preset interval c can reduce the possibility of the door body 20 interfering with the second hinge member 32 when rotating, and can also keep the second hinge member 32 as far away as possible from the seal between the door body 20 and the box body 10.

[0062] In some embodiments, the preset interval c can be 0.5-5mm, such as 0.5mm, 1mm, 2mm, 3.5mm, 5mm, etc. Of course, the preset interval c can also be other values ​​besides 0.5-5mm, which will not be listed one by one in this embodiment.

[0063] Combined again with the appendix Figure 2 As shown, in some examples, the reference surface 11 optionally has a second receiving groove 111 for receiving the second hinge member 32.

[0064] A portion of the second hinge member 32 is located in the first receiving groove 221, and another portion of the second hinge member 32 is installed in the second receiving groove 111, thereby lowering the second hinge member 32 or eliminating the portion of the second hinge member 32 protruding from the box body 10, so as to further reduce the minimum gap between the box body 10 and the wall 200 after placement.

[0065] In some embodiments, the first receiving groove 221 of this embodiment has a first opening 2211 on the side wall facing the box body 10, and the second receiving groove 111 has a second opening 1111 on the side wall facing the door body 20. The first opening 2211 and the second opening 1111 are connected to each other so that the second hinge member 32 can span the first opening 2211 and the second opening 1111 and be located in the first receiving groove 221 and the second receiving groove 111 respectively.

[0066] Combined with appendix Figure 2 Appendix Figure 5 and appendix Figure 6 As shown, in some examples, the hinge assembly 30 may optionally include a swing shaft 34, the axis of which is parallel to the axis of the pivot shaft 33, which is located between the bottom wall of the first receiving groove 221 and the swing shaft 34.

[0067] Accordingly, the second hinge member 32 in this embodiment is provided with a limiting part 321 at the upper end of the portion located in the first receiving groove 221. The limiting part 321 can be an arc-shaped hole or an arc-shaped groove. The limiting part 321 has a first end (upper end in the figure) away from the box body 10 and a second end (lower end in the figure) away from the door body 20.

[0068] One end of the swing shaft 34 is mounted on the first hinge member 31 to keep the swing shaft 34 fixed in the axial and radial directions, and the other end of the swing shaft 34 is slidably connected to the limiting part 321.

[0069] In addition to fixing the swing shaft 34 to the first hinge member 31, in some embodiments, the swing shaft 34 can also be connected to the first hinge member 31 in a way that allows it to rotate about its own axis, so that the swing shaft 34 can rotate when it slides along the limiting part 321, so as to convert sliding friction into rolling friction and reduce the friction between the swing shaft 34 and the limiting part 321.

[0070] When the door 20 is closed, the swing shaft 34 is located at the first end. When the door 20 rotates relative to the box 10, the first hinge 31 drives the swing shaft 34 to slide along the limiting part 321. The sliding trajectory is an arc. When the door 20 rotates relative to the box 10 to the maximum angle, the swing shaft 34 is located at the second end. This maximum angle can be 60°-90°, or of course, other angle ranges. This embodiment will not list them one by one.

[0071] The above structure uses the swing shaft 34 and the limiting part 321 to limit the range of the rotation angle of the door 20 relative to the box 10, so as to avoid excessive overloading of the box due to excessive rotation angle of the door 20 while meeting the usage requirements.

[0072] In some embodiments, the distance between the swing shaft 34 and the rotating shaft 33 along their arrangement direction needs to be greater than or equal to 1 mm. Specifically, the distance between the swing shaft 34 and the rotating shaft 33 along their arrangement direction can be 1 mm to 5 mm. For example, the distance between the swing shaft 34 and the rotating shaft 33 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, and 3 mm, etc. In this way, the swing shaft 34 and the rotating shaft 33 have a safe gap, reducing the possibility of mutual interference between them, and minimizing the distance between them, so that the center of the rotating shaft 33 is closer to the second surface 22.

[0073] Combined with appendix Figure 5As shown, in some instances, optionally, the second hinge component 32 of this embodiment includes a first bottom wall 322 and two first side walls 323. The two first side walls 323 are located on both sides of the first bottom wall 322 along the axial direction of the pivot 33. The first side walls 323 and the first bottom wall 322 can be integrally connected by welding, hot-melt connection or other methods, or they can be integrally formed during processing to improve the connection strength between the first side walls 323 and the first bottom wall 322.

[0074] Each first sidewall 323 is provided with a limiting part 321, which can be an arc-shaped limiting hole, so that the swing shaft 34 can pass through the two limiting holes, thereby improving the connection stability between the swing shaft 34 and the limiting part 321 and the sliding stability of the swing shaft 34.

[0075] Combined again with the appendix Figure 2 and attached Figure 5 As shown, in some examples, the hinge assembly 30 may optionally include a transmission element 35 and an elastic element 36.

[0076] The transmission component 35 includes a bushing portion 351, a connecting portion 352, and a rod portion 353 connected in sequence. The bushing portion 351 is sleeved on the part of the swing shaft 34 located between the two first side walls 323. The swing shaft 34 can rotate within the bushing portion 351, and the inner wall of the bushing portion 351 can have a certain gap with the swing shaft 34 to facilitate the rotation of the swing shaft 34 around its own axis.

[0077] The connecting part 352 can be integrally connected to the bushing part 351 and the rod part 353 respectively or integrally formed. Along the direction away from the bushing part 351, the width of the connecting part 352 gradually decreases, so that the connecting part 352 forms an approximately inverted triangular structure. The connecting part 352 can also be provided with reinforcing ribs. The lower end of the connecting part 352 has a connecting structure for connecting the elastic member 36. This connecting structure can be a slot.

[0078] The upper end of the rod 353 is connected to the connecting part 352. The hinge assembly 30 also includes a mounting base 37 located on the first bottom wall 322. The mounting base 37 has a connecting hole. The lower end of the rod 353 is inserted into the connecting through hole 371 and is slidably connected to the connecting through hole 371, so that when the swing shaft 34 slides along the limiting hole, it can drive the entire transmission component 35 to slide.

[0079] In this embodiment, the elastic element 36 is sleeved at one end and connected to the transmission element 35, and at the other end and connected to the mounting base 37. The elastic element 36 can be a spring, and the two ends of the spring can be installed on the transmission element 35 and the mounting base 37 respectively by mechanical connection methods such as snap-fit ​​or welding.

[0080] When the swing shaft 34 is at the first end, the elastic element 36 of this embodiment is stretched, that is, when the door 20 is closed, the elastic element 36 is in a stretched state and has elastic potential energy to drive the swing shaft 34 to slide to the second end. When the door 20 is opened, the spring uses its own elastic force to assist in opening the door, thereby making it easier to open the door 20.

[0081] In some examples, optionally, when the door 20 rotates from closed to a preset angle with the housing 10, the spring can be in a stretched state. The stretched spring can provide a supporting force to the transmission component 35, which can counteract the torque of the door 20 rotating to the closed state, thereby causing the door 20 to hover at the preset angle.

[0082] In some embodiments, the range of the preset angle is 10° to 90°, for example, it can be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° and 90°, etc., which will not be listed one by one in this embodiment.

[0083] This design allows the door 20 to remain suspended, so once the door 20 is opened to a preset angle, the user does not need to keep the door 20 open, thus improving the user experience. In some embodiments, the limiting part 321 and the swing shaft 34 can also be designed such that when the door 20 rotates to the preset angle, the swing shaft 34 rotates exactly to the second end of the limiting part 321.

[0084] Combined with appendix Figure 3-6 As shown, in some examples, optionally, a seal 40 is provided between the door 20 and the housing 10. The seal 40 can improve the sealing between the door 20 and the housing 10. The seal 40 can be installed on the fourth surface 24 of the door 20 or on the surface of the housing 10 facing the door 20 and having an opening. A portion of the seal 40 is located between the first receiving groove 221 and the second receiving groove 111.

[0085] To facilitate the installation of the seal 40, or to allow for the installation of the second hinge 32 by avoiding the seal 40, this embodiment provides an avoidance notch 324 on the side of the second hinge 32 facing the seal 40. The size and shape of the avoidance notch 324 are sufficient to accommodate the portion of the seal 40 located between the first receiving groove 221 and the second receiving groove 111. In some embodiments, the avoidance notch 324 may be located on the upper part of the first bottom wall 322 and the upper part of the first side wall 323, and the avoidance notch 324 is positioned directly opposite the seal 40.

[0086] Based on the opening and closing device 100 described above, this embodiment also provides an electrical appliance, which may be a refrigerator, freezer, dishwasher or disinfection cabinet. The electrical appliance includes electrical components (not shown in the figure) and the opening and closing device 100 described above. When the electrical appliance is a freezer or refrigerator, the electrical components may include a refrigeration component. When the electrical appliance is a dishwasher, the electrical components may include a dishwashing component. When the electrical appliance includes a disinfection cabinet, the electrical components may include a disinfection component.

[0087] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An opening and closing device, characterized in that, include: The box body has an opening, and a reference surface is provided on one side wall of the box body; A door body is provided to cover the opening. One end of the door body near the reference surface is mounted to the housing via a hinge assembly. The door body includes an intersecting first surface and a second surface. The first surface is disposed away from the opening. The second surface is adjacent to the hinge assembly and parallel to the rotation axis of the hinge assembly. The second surface is on the same side as the reference surface and is flush with it. The second surface has a first receiving groove. The housing has a second receiving groove. A portion of the hinge assembly is located in the first receiving groove, and another portion is located in the second receiving groove. The rotation axis of the hinge assembly is located inside the door body.

2. The opening and closing device according to claim 1, characterized in that, The first receiving slot has a first opening on the side wall facing the box body, and the second receiving slot has a second opening on the side wall facing the door body, which communicates with the first opening. The first receiving slot and the second receiving slot are connected through the first opening and the second opening.

3. The opening and closing device according to claim 1, characterized in that, The hinge assembly protrudes from the second surface in a direction perpendicular to the second surface. The maximum dimension of the portion of the hinge assembly protruding from the second surface is less than the oversize S of the door body, where S = L1 - L2. The first surface and the second surface intersect to form a first edge. L1 is the maximum perpendicular distance between the rotation axis and the first edge, and L2 is the minimum distance between the rotation axis and the second surface.

4. The opening and closing device according to any one of claims 1-3, characterized in that, The hinge assembly includes a first hinge component, a second hinge component, and a pivot. The first hinge component and the second hinge are arranged along the axial direction of the pivot and are pivotally connected by the pivot. The length direction of the first receiving groove is arranged along the axial direction of the pivot. The first hinge component and the pivot are both located in the first receiving groove. The first hinge component is connected to the first receiving groove. A portion of the second hinge component is located in the first receiving groove, and another portion is connected to the second receiving groove.

5. The opening and closing device according to claim 4, characterized in that, The hinge assembly further includes a swing shaft arranged parallel to the rotating shaft. The rotating shaft is located between the bottom wall of the first receiving groove and the swing shaft. The portion of the second hinge member located in the first receiving groove is provided with a limiting part. The swing shaft is installed on the first hinge member and slidably connected to the limiting part. The limiting part has a first end away from the box body and a second end away from the door body. When the door body is closed, the swing shaft is located at the first end. When the door body is rotated relative to the box body to the maximum angle, the swing shaft is located at the second end.

6. The opening and closing device according to claim 5, characterized in that, The second receiving groove is arranged along the length direction of the door body to the box body. The hinge assembly also includes a transmission member and an elastic member located in the second receiving groove. The bottom wall is provided with a mounting seat. One end of the transmission member extends out of the second receiving groove and is fixedly connected to the swing shaft. The other end of the transmission member is slidably connected to the mounting seat. The elastic member is sleeved on the transmission member. One end of the elastic member is connected to the transmission member. The other end of the elastic member is connected to the mounting seat. The elastic member is configured to be stretched when the swing shaft is located at the first end.

7. The opening and closing device according to claim 5, characterized in that, Along the arrangement direction from the rotating shaft to the swing shaft, the minimum distance between the rotating shaft and the swing shaft is 1mm-5mm.

8. The opening and closing device according to claim 4, characterized in that, The first receiving groove includes a bottom wall parallel to the second surface, and the second hinge seat has a predetermined interval with the bottom wall.

9. The opening and closing device according to claim 4, characterized in that, A sealing element is provided between the door body and the box body. Part of the sealing element is located between the first receiving groove and the second receiving groove. The second hinge member has an avoidance notch on the side facing the sealing element. The avoidance notch is used to accommodate the portion of the sealing element located between the first receiving groove and the second receiving groove.

10. An electrical appliance, characterized in that, It includes electrical components and an opening / closing device as described in any one of claims 1-9, wherein the electrical components are mounted on the opening / closing device.

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